Bug 1611785 (CVE-2018-10924)

Summary:	CVE-2018-10924 glusterfs: Denial-of-service via fsync(2) in Gluster FUSE client
Product:	[Other] Security Response	Reporter:	Laura Pardo <lpardo>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	abhgupta, anoopcs, atumball, bmcclain, dbaker, dblechte, dfediuck, eedri, humble.devassy, jokerman, jonathansteffan, kkeithle, matthias, mgoldboi, michal.skrivanek, ndevos, public, ramkrsna, rhs-bugs, sankarshan, sbonazzo, security-response-team, sherold, sisharma, smohan, ssaha, sthangav, trankin, vbellur, ylavi
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	glusterfs-3.12.14, glusterfs-4.1.4	Doc Type:	If docs needed, set a value
Doc Text:	It was discovered that fsync(2) system call in glusterfs client code leaks memory. An authenticated attacker could use this flaw to launch a denial of service attack by making gluster clients consume memory of the host machine.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2018-09-04 09:07:08 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1625078, 1625081
Bug Blocks:	1611787

Description Laura Pardo 2018-08-02 17:58:52 UTC

A flaw was found in Gluster 3.12.11 and 3.12.12 FUSE client. The fsync(2) system call appears to directly or indirectly leak memory in "gf_common_mt_memdup" and "gf_common_mt_char" functions. An attacker could exploit this vulnerablity to perform a Denial of Service attack.

Comment 1 Laura Pardo 2018-08-02 17:59:04 UTC

Acknowledgments:

Name: Michael Hanselmann (hansmi.ch)

Comment 2 Doran Moppert 2018-08-16 02:06:21 UTC

This memory leak does not appear to be reproducible on glusterfs-3.8.x.  The FUSE interface changed significantly between 3.8 and 3.12.

Comment 4 Siddharth Sharma 2018-09-04 05:43:53 UTC

Created glusterfs tracking bugs for this issue:

Affects: fedora-all [bug 1625078]

Comment 6 Siddharth Sharma 2018-09-04 09:07:08 UTC

upstream fix:

https://review.gluster.org/20723

Comment 7 Siddharth Sharma 2018-09-04 13:34:57 UTC

Statement:

This issue did not affect the versions of glusterfs as shipped with Red Hat Enterprise Linux 6 and 7, and Red Hat Gluster Storage 3.